Carpenter&#39;s gage.



A. G. BARROWS.

UARPENTER'S GAGE.

APPLIOATION nun) MAY 4, 1911.

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UNITED STATES PATENT OFFICE.

ARTHUR C. BARROWS, OF PROVIDENCE, RHODE ISLAND.

CARPENTERS GAGE.

To oil whom it may concern.

Be it known that I, ARTHUR G. BARRows, a citizen of the United States,residing at Providence, in the county of Providence and State of RhodeIsland, have invented an Improved Form of Carpenters Gage.

The following is a specification of my in vention:

The tool is intended to do the work of the carpenters and pattern makersgage and to mark parallel to curved and irregular edges.

In the accompanying drawing, Figure 1, is a view of the end of the gagerod, C, and of the broad side of the head, A. Fig. 2, is an edge view ofthe head, A, and a side view of the rod, C. Fig. 3, is a view of thehead, A, and clamp, B, as seen from above. Fig. 4, is the scaled gagerod partially shown in position in Figs. 1, 2, and 3.

The tool consists of a block of wood or metal, A, of the shape and sizeshown in the drawing but subject to such modifications of shape and sizeas may not affect the principle of the invention. A transverse holetangential to the middle of the top edge permits the sliding passage ofthe scaled gage rod, C, which carries an adjustable metal screw conicalmarking point at one end, a pencil marking point at the opposite end.

The rod, C, which may slide the distance between the marking points, isheld at any setting by the tangential clamp, B, consisting of a metallever, of the shape and size shown in the drawing, fastened to the head,A, at one end by a screw, at the other end by the bolt, E, and thumbnut, F.

Two rolls, D, D, of wood or metal are set upon the clamp plate. ()ne ofthem is directly over the gage rod. The points of contact of the rollswith the work may be thought of as the base and the marking point as theapex of a triangle. The smaller the base, that is the nearer the rollsto each Specification of Letters Patent.

Application filed May 4, 1911.

Patented Nov. '7, 1911.

Serial No. 625,113.

other, the less it differs from the curve it follows. A single roll doesnot afford sufficient guidance but the smaller and closer together therolls compatible with adequate guidance of the marker, the nearer themarked line approximates the curve and the sharper and more irregularcurves it will traverse satisfactorily. lVith the roll directly over themarker, marker and roll run off the work together while with the rollsat either side of the gage rod the marked line is broken at the end ofthe work. Moreover a pencil marker which passes over the surface,traverses uneven or rough surfaces alongside of irregular curves moreeasily than a metal point which scratches into the surface.

A leather washer under the clamp plate, 13, prevents abrasion of therod.

I claim as my invention:

1. The combination with a gage rod, of a gage block having a holetangential to one edge in which hole said rod is slidable, and a clamplever fastened at one end to said block on one side of said hole, andheld to said block on the other side of said hole, by a bolt passingthrough both the lever and the block, and a nut on said bolt forclamping the parts together and holding the gage rod in adjustedposition.

2. The combination with a gage rod and a gage block thereon of two rollssupported by said block for bearing against the edge of the articlebeing marked, one of said rolls being located directly over the gage rodso that its axis passes through the axis of the gage rod, and means forclamping said gage block to said gage rod.

ARTHUR O. BARROVVS.

Witnesses:

OHEsTER W. BARROWS, INEZ E. LAKIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

